Manually operated dry shaver



Aug. 17, 1943. E.' R. NYHAGEN MANUALLY OPERATED DRY SHAVER Filed Sept. 8, 1938 2 Sheets-Sheet l 5y 5M f @ff/" ATTORNEYS Aug l?, 3943, E. R. NYI-:AGEN

MANUALLY OPERATED DRY SHAVER Filed Sept. 8, 1938 2 Sheets-Sheet 2 wie INVENTOR.

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ATTORNEYS Patented Aug. 17, :1943 Y Y UNITED @STATES PATE-1N'1"{` OFFICE 1 'I i Y '2,32'z',.2ss4.f f

MANUALLY QPERATED par sHAvEn. H Barney Nyhagen, Bronx, N. Y. ,l Application september 8.1938. seriaiNc. 228355l Y solaims. (ci. adj- 43) This invention relates to vhair cutting implements and refers more particularly to anV improvement in dry Shavers. Y

TheV invention broadly comprehends a dry shaver embodyingxed 'and movable cutter elements having 'cooperative cutting edges which function to effect shearing of the hair by the pressure and rolling movement of the movable cutter element over the skin.

The invention more particularly resides in a manually operated dry shaver embodying'a nonrotary cylindrical inner toothed cutter element and a hollow Acylindrical perforated outer cutter element surrounding the non-rotary cutter element and .mounted thereon to turn with reference thereto so that the edges of the perfora-V tions thereof cooperate .with theV edges of the teeth of the innercutter element to shear off the hair which protrudes through the perforations when the outercutteruelement is pressed .ally loperable dry shaver which embodies relatively few and simple elements which are capable of economical production and assembly and Which is highly eflicient4 for its intended purpose.

, With the above enumerated and other objects in view the inventionV is setl forth in greater detherethroughrtaken lon the line 'I-T of Fig. 6. Fig. 8 is an enlarged longitudinal sectional View Y `taken lon the line 8--8 of Fig. '7.

VReferring to the drawings by characters of reference, I0 designates a handle which is provided at one end with a U-shaped bearing yoke II. having a pair of spaced parallel bearing arms I21which are formed With'aligned slots I3 opening through the router ends thereof to receive the shank I4 of a bolt having a knurled head I5 at one end and a threaded opposite extrem- -ityIS-which receives the knurled nut ll.

An inner non-rotary cutter element,V designated generallyv by the reference character 20, is of hollovvlcylindrical formation and is formed with longitudinally extending radial slots 2|, the opposite extremities of which terminate in slightly. spacedrelation'to the en d walls 22. The

end Vwalls are provided with outwardly protruding bosses 23 having aligned openings 24 which `receiveA therethrough the-bolt shank I4.

The inner cutter element 20 issecured against .rotationbytightening the nut I'i to frictionally clamp the bearing arms I2 against the outer .ends of the bosses 23. An outer hollow cylin- Ai drical cutter element ofthin gage metal is mounted in surrounding relation to the inner cutterv element with the inner diameter thereof `-of slightly greater size than the outer diameter 'of the inner cutter element so that said outer cutter element is capable of free rotation with referenceto the inner cutter element. The

' outer cutter element 30 is of slightly greater tail in the followingV specification, illustrated in the accompanying drawings,.and pointed out in the appended claims. 1'

In the drawings:` v y Fig. 1 is a perspective View of a dry shaver constructed in accordance with the invention.

Fig. 2 .is an enlarged. sectional view there- Y throughtaken approximately on the line indicated at. 2--2in,Fig. 1.

Fig. 3as an enlarged-longitudinal sectional vView taken approximately on the 'line' 3--3 of Fig. 2.

Fig. 4 is an enlarged fragmentary perspecltive View of a modified form of inner cutter clement. Y

' Fig. 5 is a fragmentary side View illustrating a modified form of outer cutter element.

Fig. 6 is a perspective-view of a dry shaver illustrating a modified form of the invention.

Fig. 7 is an enlarged transverse sectional View.:

length than the main body portion of the inner ycutter Velement but is of -lesser length than the vdistance between the outer end surfaces of the bosses Y23 and said outer cutter element has ar- ;ranged withinj'the opposite ends thereof, the

rings or collars 3l which areprovided with annular outwardlyprojecting beads 32, the outer peripheries of 'which are of slightly greater diameter than the outerA cutter element 30 so as to provide aprotective'means for the opposite 'end edges thereof.

The collars or rings 3| are frictionally fitted within the outer cutter element 30 and are "further retained in place against displacement due to the fact that they are confined between the bearing armsV I2. The outer cutter element 30 is formed with annular rows of perforations 33,

f the edges of which are adapted to cooperate With Y the edges of the slots 2I of the inner non-rotary cutter element to shear the hair which protrudes through the perforations 33 into the slots 2l v, cated terminal 54 of the arm 52.

when the outer cutter element is pressed against and rolled over the skin.

In use and operation the device is grasped by Y ment 2D andy are collected therein. In order to permit of periodic emptying or discharge of the severed particles of hair, outlet openings are provided in the ends 22 of the inner cutter ele-l ment and their discharge may be accomplished by blowing through the openings of one end to l force the same through the openings of the other end. Y Y

In the modied form of the invention illustrated in Fig. 4 of the drawings, the inner cutter element 2i) is provided with angularly or helically disposed slots ZIA so that relative movement of the cutting edges of the perforations and slots is at an angle to more effectually shear the hair.

In the modification illustrated in Fig. 5 of the drawings, the endmost perforations of. the outer cutter element 36 are in the form of elongated slots havinginwardly projecting teeth 4l at the opposite edges thereof. The purpose of this is to provide larger perforations for receiving longerhair that normally could not be acl;

connnodated by the smaller perforations 33.

ln the modincation of the invention illustrated in Figs. 6, 7 and 8 of the drawings, the Vhandle 5t is provided one end witha U-shaped bearing ycke 5l having a pair of spaced parallel arms 52 and which arms are formed-with bifurcated terminals 55s-and V55. A bolt 55 is provided having-an enlarged head 5l at oneend thereof which is ulcrumed en a pivot pin 5B extending elv through the furcations of the bifur- The bolt 56 adjacent the head 51 isr provided with a square or non-circular portion 59 while the opposite terminal thereof is threaded as at 60 to receive a knurled nut Si. In this-form of the invention aninner non-rotary cutter element 62 is provided one end portion 63 of which is of semi- .spherical formation, the yopposite end face 64 thereof beingriiat. The opposite ends ofthe inner. non-rotary cutter element have protruding therefrom bosses 65 and 66. Y

, The cutter element 62 is provided with, an ax- Y iai bore el having an enlarged square or Anoncircular` portion 88 which interni-.s with the square or nen-circular portion 59 of the bolt shank 53 so ast'o keythe cutter element 62 on kthe bolt against rotation. The threaded extremity S'ofthe bolt shank extends through thehifurcated terminal 55 of the arm 53 andv tightening of the nut 6l clamps and retains the inner cutter element 't2 Vin operativev position with reference to the handle 50. The outer periphery of the cutter element is provided-with longitudi- Ater element 62 with .the edge ofthe semispherical end 1I thereof arranged between the enlarged head 51 of the bolt and the semi-spherical end 63 of the inner cutter element.

The outer cutter element 10 isadapted for free rotation with reference to the Vinner'cutter element and the open end edge extends slightly beyond the flat end face 64 of the inner cutter element 62 and has tted therein a cap 12 formed with a marginal outwardly projecting protecting bead 13. The outercutter element 10 is formed with annular rows oi` perforations`14 throughout its length and throughoutthe semi-spherical end portions 1l, the edges of which are adapted to cooperate with the edges of the grooves 69 of the inner non-rotary cutter element 62 to shear the hair which protrudes through the perforations and into the grooves when the outer cutter element is pressed against and rolled over the skin. In this form of the invention, the semi-spherical end portions of the vinner and outer cutter elements provide a convex hair shearing medium by virtue of which a close shave may be obtained on any portion of the face or anatomy,r

It will also be observed that when it is desired toremove lthe cutter elements, it is only necessary to remove the nut 61 and swing the bolt on yits pivot pin 58 to a position where the cap 12 is first removed, then the inner cutter elementI 62 andfnally the outer cutter element 10. In assembling, this order is reversed. What is'claimed is:

l. A. manually operable dry shaver including a handle having a bearing yoke at one end provided with va pair of spaced parallel slotted arms, a bolt extending through the slotted portions of the arms, an inner hollow cylindrical Acutter element having,protruding bosses'at its opposite Y endsclamped againstrotation by said bolt between the arms, longitudinally extending radial slots formed in said cutter elementdeiining cut- .Y ting teeth, and an outer hollow cylindrical cutter element'having perfor-ations providing cutting teeth, saidouter cutter element surroundingthe inner cutter element and mountedfthereonto freely. turn Awith reference thereto for cooperative cutting engagement of the teeth of the inner and outer cutter elements.

. 2, yA manually operable dry shaverA including v ahandle-havingabearing yoke at one end proelement having protruding bosses at its opposite ends clamped against rotation by' said bolt between the arms, longitudinally extending radial slots formed in saidcutter Yelement dening cutting teeth, an outer hollow cylindrical cutter element having perforations ,providing cutting teeth, said outer cutter. element surrounding the inner .cutter element. and mounted thereon to freely turn with referenceV thereto forlcooperative cutting'engagementvof the teeth of the inner and outer cutter elements, rand annularrcol- 'lars having beads protruding beyond the periphery ofthe outer cutter elementand fitted against the opposite ends of the outer cutter element to protect the end edges .thereofs 3. A' manually operable dry shaver including a handle having a bearing yoke at one end provided with 'a pair of. spaced parallel slotted arms, a bolt extending through .the slotted portions of the.arms, an inner hollow cylindrical VVcutter element having protruding ,bosses at its` opposite ends clamped against rotation by said bolt betWeen the arms, longitudinally extending radial slots formed in said cutter element defining cutting teeth, an outer hollow cylindrical cutter element having perforatons providing cutting eeth, said outer cutter element surrounding the inner cutter element and mounted thereon to freely turn with reference thereto for cooperative cutting engagement of the teeth of the inner and outer cutter elements and annular collars having beads protruding beyond the periphery of the outer cutter element and fitted against the opposite ends of the outer cutter element to protect the end edges thereof, said collars being conned between the arms of said yoke'.

BARNEY NYHAGEN. 

